Portable air compressor



FIG. 1 is a top perspective view thereof;

FIG. 2 is a right hand side view thereof;

FIG. 3 is a left hand side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a portable air compressor, as shown and described. 